Healthiest Macaroni and Cheese

INGREDIENTS

• 2 teaspoons of kosher salt
• 1 head of cauliflower finely chopped
• 4 cups cubed peeled butternut squash (about 1 1 1/2 pound squash)
• 1/4 cup (1 ounce) of finely grated fresh Parmigiano-Reggiano cheese
• 9 ounces of cheddar cheese
• 1 pound uncooked your favorite pasta
• 4 cups of low- fat milk
• 1 teaspoon of freshly ground black pepper